期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 138, 期 31, 页码 -出版社
WILEY
DOI: 10.1002/app.50792
关键词
dielectric properties; flame retardance; thermosets
资金
- Foundation of 2019 Science and Technology Projects of Qingdao West Coast New District [2019-18]
The compound (4-fluorophenyl)(phenyl) phosphine oxide (4-FPO) was utilized to modify epoxy resin (EP), resulting in improved flame-retardant properties, hydrophobicity, and dielectric properties. The addition of 0.6wt% phosphorus in the 4-FPO-modified EP significantly enhanced the flame retardancy of the material, while also showing improvements in hydrophobic and dielectric properties.
The compound (4-fluorophenyl)(phenyl) phosphine oxide (4-FPO) was designed, synthesized, and used in the modification of epoxy resin (EP). The 4-FPO-modified EP was prepared by curing the reaction mixture of diglycidyl ether of bisphenol A (DGEBA) and 4-FPO in the presence of 4,4 '-diaminodiphenylsulfone (DDS). Compared with the unmodified EP, the limiting oxygen index value of the EP/4-FPO-0.6 (4-FPO-modified EP with 0.6 wt% of phosphorus) increased to 31.6%, and the sample achieved UL-94 V-0 rating. The peak of the heat release rate, average of the heat release rate, and total heat release of EP/4-FPO-0.6 were reduced by 39, 24, and 19%, respectively. Mechanism study showed that the quenching effect in the gas and barrier effect in the condensed phase were responsible for the enhanced flame-retardant properties of the 4-FPO-modified EP. The results showed that hydrophobicity and dielectric properties of the modified EP were clearly improved.
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